佛祖統紀 42.108

42.108

乾祐元年。吳越王錢俶。奉天台沙門德韻為國師。申弟子之禮。

In the first year of the Qianyou reign period, King Qian Chu of Wuyue honoured the Tiantai śramaṇa Deyun as National Preceptor and rendered the etiquette of a disciple.